﻿// Copyright (c) 2010. Eric Nelson  
// https://code.google.com/p/prompts/
// All rights reserved.
//     
// Redistribution and use in source and binary forms,   
// with or without modification, are permitted provided   
// that the following conditions are met:    
// * Redistributions of source code must retain the   
// above copyright notice, this list of conditions and   
// the following disclaimer.    
// * Redistributions in binary form must reproduce   
// the above copyright notice, this list of conditions   
// and the following disclaimer in the documentation   
// and/or other materials provided with the distribution.    
// * Neither the name of Eric Nelson nor the   
// names of its contributors may be used to endorse   
// or promote products derived from this software   
// without specific prior written permission.    
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND   
// CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,   
// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF   
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE   
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR   
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,   
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,   
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR   
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS   
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,   
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING   
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE   
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF   
// SUCH DAMAGE.
// 
//     
// [This is the BSD license, see  
// http://www.opensource.org/licenses/bsd-license.php]  
using System.Collections.ObjectModel;
using Prompts.Prompting.ViewModels;
using Prompts.Service.PromptService;

namespace Prompts.Prompting.Construction.Implementation
{
    public class ShoppingCartBuilder<T> : IPromptBuilder where T :IPromptItem
    {
        private readonly IPromptItemProvider<T> _promptItemProvider;
        private readonly IMultiSelectPromptProvider<T> _multiSelectPromptProvider;

        public ShoppingCartBuilder(
            IPromptItemProvider<T> promptItemProvider
            , IMultiSelectPromptProvider<T> multiSelectPromptProvider)
        {
            _promptItemProvider = promptItemProvider;
            _multiSelectPromptProvider = multiSelectPromptProvider;
        }

        public IPrompt BuildFrom(PromptInfo promptInfo)
        {
            var items = new ObservableCollection<T>();
            var defaultItems = new ObservableCollection<IPromptItem>();

            foreach (var availableItem in promptInfo.PromptLevelInfo.AvailableItems)
            {
                var promptItem = _promptItemProvider.Get(
                    promptInfo.Name
                    , promptInfo.PromptLevelInfo.ParameterName
                    , availableItem);

                foreach (var defaultValidValue in promptInfo.DefaultValues)
                {
                    if(availableItem.valueField == defaultValidValue.valueField)
                    {
                        defaultItems.Add(promptItem);
                    }
                }

                items.Add(promptItem);
            }

            return _multiSelectPromptProvider.Get(
                promptInfo.Label, 
                promptInfo.Name, 
                items, 
                defaultItems);
        }
    }
}